Electric switch



M. GU-ETT. v ELECTRIC SWITCH. APPLICATION FILED JULY 15 1-919.

1,339,820. Patented May 11, 1920.

7 7 6 I &- T-f Q E a 1 I7 /0 8 a w UNITED STATES PATENT OFFICE."

MONROE GUETT, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE HART 8c HEGEMAN MANUFACTURING COMPANY, CONNECTICUT.

ELECTRIC SWITCH.

Patented May 11, 1920.

Application filed July 15, 1918. Serial No. 310,933.

To all whom it may concern:

.Be it known that I, MONROE GUETT, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Electric Switches, of which the following is a specification.

This invention relates to electric'switches. I am not restricted to the incorporation of the invention in a switch of any particular type, although the same is of especial utility, however, when employed in conjunction with a switch, the switching or circuitcontrolling member of which has a back and forth movement, generally oscillatory, about an axis. A-switching or circuit-controlling member of this nature has at least two positions, one, the off and the other, on. When the switching or circuit-com trolling member is in the on position, it cooperates with contacts which press against the free portion or end of the switching or. circuit-controlling member. Heretofore, the force ordinarily employed primarily by manually-operable. means, is not efficiently japplied. I overcome this drawback in a satisfactory manner and this I might observe at this point is-probably the primary motive I have in view.

In the drawings accompanying and forming part of the present specification, I have shown somewhat in detail, one of the sev eral forms of embodiment of the invention, which to enable those skilled in the art to practice the same, will be set forth in the following description. As may be inferred I am not restricted to this particular disclosuref I may in fact departv therefrom in several particulars within the scope of the invention defined by the claims following said description. Referring to said draw- 1ngs:-

Figure 1 is a top plan view of the switch, with the switching member in the off relation.

Fig. 2 is a section on the line 22 of Fig. 1, looking in the direction of the arrows.

Figs. 8 and 4 are sectional details of the switching mechanism, hereinafter more particularly described and showing the switching member in the off and on positions respectively, the scale being somewhat larger than that of Figs. 1 and 2.

'Like characters refer to like parts throughout the several views.

The different parts of the switch can be supported in any convenient manner. For this purpose Ihave shown a body as 2, which will usually, be made from insulatmg material or some composition as common in the art. The switching or circuitcontrolling membershown is denoted in a general way by 3. It is practically of inverted U or yoke form, being pivotally mounted as at 4 within an aperture in the supporting body 2.

The actuator for the switching member 7O 01 HARTFORD, CONNECTICUT, ACORPORATION OF situated below the path of movement of the actuator body 6, the legs or branches of the switching member straddling the actuator body.

There'is disposed between theswitching- Y and free fit in the elongated slot 18 in the cross bar of the switching member. Around the pin 13 is shown a coiled-spring 19 bearing at its lower end against the fork or foot 14 and at its upper or outer end against the cross bar or transverse portion of the switching member 3.

The point of connection between the actuator 6 and the pin 13 is alternately moved across a dead center line.

ment of the switching member and also In this case the dead center line intersects the axis of movethe pin 13 against which the up .theispring that part of 1 r end of through passes through the center of 19 bears or practical y the center of the slot 18. h p

In, Fig. 4 the switching member 3v is shown as being in the on relation, it being between the free portions of the yieldable or springy terminals 20 of contacts as 21 fastened to the body or base and to which terminals wires (not shown) are electrically and mechanically connected. In this particnlar view the actuator-5 through the manipulation of the button 8 (Figsbls-and 2) is supposed to have been pushed or pulled. practically to the limit of its movement "toward the right. Thismovement of the actuator cause the center of connection between the fork 14 and the bar-15 to move' across the dead center line to which I have '19. I have assumed the spring to referred and naturally resulted in the upward movement relatively of the pin 13and the consequent compression of the spring be under virtually maximum compression in said Fig. 4, the actuator as having completed its stroke through manual operation, and the switchingmember as ready to commence its .movement.

When it does move it follows the direction of the arrow in'said Fig. 4

the compression spring causing the snap mov'ementof the switching member to the of? sition.

In ig.3 theactuator 5 is supposed to have completed practically its movement toward the left. This particularmovement ;of course resulted in the conditionin of the ent case,

-movement of the switching member.

It requires less force naturally to start the switching member from the off to the on than from the on to the off positions. In the movement from off to on the motion of the cross bar 15 by or past the dead center line of the switch, is less than the motion of the cross barby or past said dead center line, when the switching mem= her is moved from the ontoward the off position. As it might be otherwise stated the distance traveled by the center of con nectionbetween the bar 15 and the pin 13, is

greater at one side of the dead center line than at the other side, being greater at what is shown as the right side of said line than at the left side. I obtain advantages bythis, the principal of them being that I secure the necessarv amount of torque to shown as ing adapted tocondition the spring properly overcome the resistance on what is being the left side of said dead. center line, at which time the movement of the switchin member is retarded by the friction oft e contacts.

1 What I claim is 1. A switch compris'in mounted for back and fort?! movement, an oscillatory switching member, a pin between the actuator and the switching member, hav- 'ing a pivotalconnection with one and an operative connection with the other, a spring between the switching member and an actuator thepin, the actuator on each movement thereof. being adapted to condition the spring to snap the switching member, and contacts engageable by the switching member, the range of movement of the point of connection between the actuator and said pin being greater on one side center line than on the other line. Y

tide of said of the dead switch comprisingan actuator mounted for back and forth movement, an

i oscillatory switchingmember, a pin between the actuator and the switching member, havinga pivotal connection with one and an operative connection with the other, a spring between the switching member and the pin, the actuator on each movement thereof bethe switching member between the on and to snap off positions thereof, and contacts engageable by the switching member, the range of movement of the point of connection between the actuator and saidpin being ater on that side of said dead center Zine at which the contacts are located than on the other side of said line.

3. A switch comprising 1 an actuator mounted for back and forth movements and an oscillatory switching member, one of the parts having a bar, a pin having a fork in straddling engagement with the bar and operatively associated with the switching member, the range of movement of the point of connection between the actuator and the pin, being greater on that side of the dead center line of the switch, at which the contacts are located, than on the other side of said line and a spring. interposed between the switching member and the actuator.

4. A switch comprising an actuator mounted for-back and forth movement, an

oscillatory switching member, a pin between the actuator and the switching member, the -pm having a fork and the actuator having a the switching mechanism, and contacts engageable by the switching member, the range of movement of the point of connection between the actuator and said pin being greater on-that side of said dead center line, at which said contacts are located, than on the other side of said line.

5. A switch comprising an actuator mounted for back and forth movement, an oscillatory switching member, pin and spring means between the switching member and the actuator, the pin being connected with the actuator, and contacts engageable by the switching member when in the on relation, the actuator being adapted on each of its movements to condition the spring means to impart a snap to the switching member to carry the same across the dead vcenter line thereof, thepoint of connection MONROE GUETT.

Witnesses:

A. J. BENNETT, J. M. KINGSLEY. 

